RunningHeadShow

Choose which heading a RunningHead shows on each page.

Selects which heading a RunningHead shows on each page. The previous section remains active until another matching heading, a within match, or an element with data-running-head-reset changes it.

Variants

Name	Description
`first`	The first matching heading on the page. If there is no match, uses the previous section. This is the default.
`start`	The section active at the top of the page. If the page opens with matching headings, uses the last of them. Otherwise, uses the previous section, even if a new section starts farther down the page.
`last`	The last matching heading on the page. If there is no match, uses the previous section.
`firstExcept`	Like `first`, but empty on pages with a matching heading. Use this to hide the running head on chapter opening pages.
`range`	The first and last sections on the page, joined by `rangeSeparator`. Includes the previous section if its content continues onto the page. Identical entries appear once. With `within`, includes only sections in the chapter active at the top of the page. Pair with `start` on the chapter running head.

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